Optical resonant cavity and display panel

Abstract

Embodiments of the present disclosure provide an optical resonant cavity and a display panel. The optical resonant cavity includes a light conversion layer, the optical resonant cavity is configured to emit light with a specific wavelength range, and the light conversion layer is arranged at at least one wave node of a center wavelength of the light with the specific wavelength range in the optical resonant cavity.

What is claimed is: 
     
       1. A reflective optical resonant cavity, comprising:
 a first functional layer; 
 a second functional layer opposite to the first functional layer; 
 an optical medium layer between the first functional layer and the second functional layer, 
 a light conversion layer in the optical medium layer, 
 wherein the first functional layer is a transflective film, and the second functional layer is a total reflection film, the optical resonant cavity comprises a silver film, a first silicon dioxide film, a light conversion material film, a second silicon dioxide film and a titanium dioxide film which are stacked in sequence; and 
 the titanium dioxide film is used as the first functional layer, the silver film is used as the second functional layer, the first silicon dioxide film and the second silicon dioxide film are together used as the optical medium layer, and the light conversion material film is used as the light conversion layer. 
 
     
     
       2. The reflective optical resonant cavity according to  claim 1 , wherein
 a sum of an optical thickness of the optical medium layer and an optical thickness of the light conversion layer is a positive integer multiple of a half of the central wavelength of the light with the specific wavelength range. 
 
     
     
       3. The reflective optical resonant cavity according to  claim 1 , wherein
 a refractive index of the light conversion layer is greater than a refractive index of the optical medium layer. 
 
     
     
       4. The reflective optical resonant cavity according to  claim 1 , wherein
 a distance between a thickness center plane of the light conversion layer and the wave node of the center wavelength of the light with the specific wavelength range is not greater than 1/30 of the center wavelength. 
 
     
     
       5. The reflective optical resonant cavity according to  claim 1 , wherein
 a thickness of the light conversion layer is not more than 1/30 of the central wavelength of the light with the specific wavelength range. 
 
     
     
       6. The reflective optical resonant cavity according to  claim 1 , wherein
 the light with the specific wavelength range is a monochromatic light. 
 
     
     
       7. The reflective optical resonant cavity according to  claim 6 , wherein
 the monochromatic light is one of red light, green light and blue light. 
 
     
     
       8. The reflective optical resonant cavity according to  claim 6 , wherein
 a material of the light conversion layer comprises an up-conversion luminescent material and/or a down-conversion luminescent material for obtaining the monochromatic light. 
 
     
     
       9. The reflective optical resonant cavity according to  claim 8 , wherein
 the up-conversion luminescent material comprises an inorganic compound doped with rare earth ions, and the down-conversion luminescent material comprises a fluorescent material or a quantum dot material. 
 
     
     
       10. The reflective optical resonant cavity according to  claim 1 , wherein the optical resonant cavity comprises a plurality of the light conversion layers, the plurality of the light conversion layers are spaced apart from each other, and the plurality of the light conversion layers are arranged at different wave nodes of the central wavelength of the light with the specific wavelength range. 
     
     
       11. The reflective optical resonant cavity according to  claim 1 , further comprising an antireflection film, wherein
 the antireflection film is arranged on a side of the first functional layer away from the second functional layer. 
 
     
     
       12. The reflective optical resonant cavity according to  claim 1 , further comprising: a metal absorption layer,
 wherein the metal absorption layer is arranged on a side of the first functional layer, or is arranged in the first functional layer. 
 
     
     
       13. A reflective display panel, comprising
 a reflective optical resonant cavity, wherein the reflective optical resonant cavity comprises:
 a first functional layer; 
 a second functional layer opposite to the first functional layer; 
 an optical medium layer between the first functional layer and the second functional layer, 
 a light conversion layer in the optical medium layer, 
 wherein the first functional layer is a transflective film, and the second functional layer is a total reflection film; the optical resonant cavity comprises a silver film, a first silicon dioxide film, a light conversion material film, a second silicon dioxide film and a titanium dioxide film which are stacked in sequence; and the titanium dioxide film is used as the first functional layer, the silver film is used as the second functional layer, the first silicon dioxide film and the second silicon dioxide film are together used as the optical medium layer, and the light conversion material film is used as the light conversion layer; and 
 
 a light intensity control structure, 
 wherein the light intensity control structure and the optical resonant cavity are stacked, and the light intensity control structure is configured to control an intensity of light passing through the light intensity control structure. 
 
     
     
       14. The reflective display panel according to  claim 13 , wherein
 the display panel is a reflective display panel, the light intensity control structure and the optical resonant cavity are arranged in sequence from a display side of the display panel to a non-display side of the display panel. 
 
     
     
       15. The reflective display panel according to  claim 13 , wherein
 the light intensity control structure is an electrochromic light intensity control structure, 
 the electrochromic light intensity control structure comprises a first electrode, a second electrode and an electrochromic layer, and the first electrode and the second electrode are configured to control the electrochromic layer if an electric signal is applied to the first electrode and the second electrode. 
 
     
     
       16. The reflective display panel according to  claim 13 , wherein
 the light intensity control structure is a liquid crystal light intensity control structure, 
 the liquid crystal light intensity control structure comprises a third electrode, a fourth electrode, a first polarization layer, a second polarization layer and a liquid crystal layer, a first polarization direction of the first polarization layer is perpendicular to a second polarization direction of the second polarization layer, the liquid crystal layer is sandwiched between the first polarization layer and the second polarization layer, and the third electrode and the fourth electrode are configured to control the liquid crystal layer if an electrical signal is applied to the third electrode and the fourth electrode. 
 
     
     
       17. The reflective optical resonant cavity according to  claim 1 , wherein the light conversion layer is arranged at at least one wave node of a center wavelength of light with a specific wavelength range in the optical resonant cavity. 
     
     
       18. The reflective optical resonant cavity according to  claim 1 , wherein the optical medium layer includes material selected from a group consisting of air, an inorganic material, or an organic material. 
     
     
       19. The reflective optical resonant cavity according to  claim 18 , wherein the inorganic material is a low refractive index material including silicon dioxide, or magnesium fluoride.